Alaska's Glacier Bay was established as a National Park and Preserve in 1980. The park covers over 3.2 million acres and supports a vast array of flora, fauna and geologic wonders. Pods of Humpback whales migrate yearly from Hawaii to feed in the sound teeming with phytoplankton. Interestingly, a number of the giant glaciers first seen by English explorer George Vancouver about 200 years ago have receded 20 to 60 miles in land. However, these magnificent tidewater glaciers still spill into the bay, "calving" giant icebergs.